Calibration port adaptor for a gas sensor



FIG. 1 is a top and right, front perspective view of a calibration port adaptor for a gas sensor showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a calibration port adaptor for a gas sensor, as shown. 